Online nuclear magnetic carbon dioxide displacement long core device
Through the design of the online nuclear magnetic carbon dioxide flooding long core device, the problem of difficulty in accurately evaluating the impact of carbon dioxide on rocks in the existing technology is solved, real-time monitoring of the carbon dioxide flooding process and multi-dimensional data analysis are achieved, and scientific decision-making in oil field development is supported.
Patent Information
- Application Number
- CN202420563026.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-22
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-03-22
AI Technical Summary
In carbon dioxide oil flooding technology, it is difficult for the existing technology to accurately evaluate the impact of carbon dioxide on rocks and its applicability in oil field development, and there is a lack of effective methods for real-time monitoring and analyzing core physical and chemical parameters.
An online nuclear magnetic carbon dioxide flooding long core device was designed. Through constant speed and constant pressure metering pumps, nuclear magnetic instruments, gas flowmeters and other components, the changes in gas flow, core porosity and permeability during carbon dioxide flooding were monitored in real time, providing multi-dimensional data support for oil field development.
Real-time monitoring and data analysis of the carbon dioxide flooding process are achieved, more accurate evaluation of core properties parameters, and scientific decision-making in oil field development plans are provided.
Smart Images
Figure CN222825488U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the capture, utilization and storage of carbon dioxide in oil and gas layers in the petroleum and natural gas industry, and specifically to the evaluation of parameters of underground migration law of carbon dioxide and the study of properties of underground carbon dioxide. Background Art
[0002] With the increasing demand for traditional oil resources and the concern for environmental protection, CO2 flooding technology has gradually attracted attention. This technology increases the pressure in the oil field by injecting CO2, reduces the viscosity of crude oil, and thus improves the recovery rate. At the same time, in order to cope with global climate change and control greenhouse gas emissions, CCUS captures and purifies the CO2 emitted during the production process, and then puts it into the new production process for reuse and storage. With the global response to climate change and carbon neutrality goals, CCUS, as a carbon reduction and carbon fixation technology, has become an important part of the carbon neutrality action plan of many countries. In CO2 flooding technology, core analysis technology can provide key parameters such as permeability, porosity, pore structure, etc., to help evaluate the impact of CO2 on rocks and its applicability in oilfield development. The CO2 flooding core parameter evaluation device is designed to more accurately evaluate the response and characteristics of rocks during CO2 flooding. This device needs to be able to measure and analyze various physical and chemical parameters of rocks and provide reliable data to support decision-making and oilfield development plans. Utility Model Content
[0003] The utility model provides an online nuclear magnetic carbon dioxide displacement long core device, which is used for understanding the carbon dioxide displacement effect under formation conditions and evaluating the physical property parameters of the core.
[0004] The technical solution adopted by the utility model is:
[0005] The utility model is an online nuclear magnetic carbon dioxide displacement long core device, which is mainly composed of a constant speed constant pressure metering pump, a check valve 1-9, a crude oil storage tank, a carbon dioxide storage tank, a formation water storage tank, an HBD-2 type high pressure annular pressure pump, a fake core steel block, a nuclear magnetic instrument, a KDHB-70 type back pressure tracking pump, a core displacement experimental device, a 10ml test tube with a scale, a gas flow meter, and a core clamp. The utility model is characterized in that: the constant speed constant pressure metering pump leads out a single pipeline and then connects three pipelines with a check valve 1, a check valve 2, and a check valve 3, and is connected with the crude oil storage tank, the carbon dioxide storage tank and the formation water storage tank, and then leads out a single pipeline with a check valve 4, a check valve 5, and a check valve 6 to be collected in a single pipeline, and then connected with the left side of the core clamp with a check valve 7. The HBD-2 type high pressure annular pressure pump leads out a single pipeline with a check valve 8 and is connected with the core displacement experimental device. A single pipeline with a one-way valve 9 led out of the KDHB-70 back pressure tracking pump is connected to the right side of the core holder, and then the pipeline led out from the right side is connected to a 10 ml test tube with a scale, and then a single pipeline is led out from it to connect to the gas flow meter, and then connected to the computer. The data collection device consists of an HBD-2 high-pressure annular pressure pump (6), a nuclear magnetic resonance instrument (8) and a gas flow meter (12), which can monitor the gas flow, core porosity and permeability changes in real time during the carbon dioxide displacement process, providing multi-dimensional data support for experimental analysis. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 This is a schematic diagram of the structure of an online nuclear magnetic carbon dioxide displacement long core device of the utility model.
[0007] Figure 2 This is a schematic diagram of the structure of the fake core steel block.
[0008] Figure 3 This is a schematic diagram of the core holder structure.
[0009] Figure 4 This is a schematic diagram of the structure of the nuclear magnetic coil
[0010] In the figure: 1. Constant speed and constant pressure metering pump, 2. Check valve, 3. Crude oil storage tank, 4. Carbon dioxide storage tank, 5. Formation water storage tank, 6. HBD-2 high pressure ring pressure pump, 7. Fake core steel block, 8. Nuclear magnetic resonance instrument, 9. KDHB-70 back pressure tracking pump, 10. Core displacement experimental device, 11. 10ml test tube with scale, 12. Gas flow meter, 13. Core holder DETAILED DESCRIPTION
[0011] The utility model is further described below in conjunction with the accompanying drawings.
[0012] like Figure 1 , Figure 2 , Figure 3As shown, the utility model is an online nuclear magnetic carbon dioxide displacement long core device, which mainly consists of a constant speed constant pressure metering pump (1), a one-way valve 1-9 (2), a crude oil storage tank (3), a carbon dioxide storage tank (4), a formation water storage tank (5), an HBD-2 type high pressure annular pressure pump (6), a fake core steel block (7), a nuclear magnetic instrument (8), a KDHB-70 type back pressure tracking pump (9), a core displacement experimental device (10), a 10 ml test tube with a scale (11), a gas flow meter (12), and a core clamp (13). The core clamp (13) contains two fake core steel blocks (7) located on both sides, and its outside is surrounded by the core displacement experimental device (10), and there is a nuclear magnetic instrument (8) connected to a computer on the periphery of the middle part. A single pipeline led out of a constant speed constant pressure metering pump (1) is connected to three pipelines with check valves 1, 2, and 3 (2), and is connected to a crude oil storage tank (3), a carbon dioxide storage tank (4), and a formation water storage tank (5). A single pipeline led out of each of the pipelines is connected to a check valve 4, 5, and 6 (2), and is then connected to a single pipeline with a check valve 7 (2) and connected to the left side of a core holder (13). A single pipeline led out of a HBD-2 high pressure annular pressure pump (6) is connected to a core displacement experimental device (10). The KDHB-70 back pressure tracking pump (9) leads out a single pipeline with a one-way valve 9 (2) and connects to the right side of the core holder (13). The pipeline from the right side is then connected to a 10ml test tube (11) with a scale. The 10ml test tube (11) with a scale has a wooden plug with two small holes. The left and right pipelines are connected from the small holes, and the length of the left pipeline in the test tube is greater than the length of the right pipeline. A single pipeline is led out from it and connected to a gas flow meter (12), and then connected to a computer. All pipelines are made of stainless steel. The data collection device consists of an HBD-2 high-pressure annular pressure pump (6), a nuclear magnetic resonance instrument (8) and a gas flow meter (12). It can monitor the gas flow, core porosity and permeability changes in real time during the carbon dioxide displacement process, and provide multi-dimensional data support for experimental analysis.
[0013] like Figure 4 As shown, the nuclear magnetic coil of the nuclear magnetic instrument (8) at the periphery of the middle part of the core displacement experimental device (10) is as follows Figure 1As shown above, when the device is used, the core is first loaded into the core holder. Then, the check valve 1 is opened, and the formation water storage tank is pressurized by a constant speed constant pressure metering pump. After the pressurization is completed, the check valve 7 (8) (9) is opened, and the ring pressure and back pressure are applied by the high-pressure ring pressure pump and the back pressure tracking pump. The check valve 4 is opened to drive the formation water into the core. After the formation water is produced in the test tube, the check valve 1 (4) is closed and the core is inspected by nuclear magnetic resonance. Then, open the check valve 2, and pressurize the crude oil storage tank through the constant speed and constant pressure metering pump. After the pressurization is completed, open the check valve 5 to allow the crude oil to be displaced into the core. After oil is produced in the test tube, close the check valve 2 (5). Then, open the check valve 3, and pressurize the carbon dioxide storage tank through the constant speed and constant pressure metering pump. After the pressurization is completed, open the check valve 6 to allow the carbon dioxide to be displaced into the core. Use the gas flow meter to detect the gas flow rate at each moment. When the gas flow rate is equal to the gas flow rate provided by the constant speed and constant pressure metering pump, close the check valve 2 (5) and use nuclear magnetic resonance to inspect the core. Finally, the migration law of carbon dioxide in the formation under geological storage conditions is analyzed through the image results of two nuclear magnetic resonances and the gas flow data.
Claims
1. An online nuclear magnetic carbon dioxide displacement long core device, mainly composed of a constant speed constant pressure metering pump (1), a one-way valve 1-9 (2), a crude oil storage tank (3), a carbon dioxide storage tank (4), a formation water storage tank (5), an HBD-2 type high pressure ring pressure pump (6), a fake core steel block (7), a nuclear magnetic instrument (8), a KDHB-70 type back pressure tracking pump (9), a core displacement experimental device (10), a 10 ml test tube with a scale (11), a gas flow meter (12), and a core holder (13), characterized in that: A single pipeline led out of a constant speed constant pressure metering pump (1) is connected to three pipelines with one-way valves 1, 2 and 3 (2), and is connected to a crude oil storage tank (3), a carbon dioxide storage tank (4) and a formation water storage tank (5), and then a single pipeline led out of each of them with one-way valves 4, 5 and 6 (2) is collected into a single pipeline, and then connected to the left side of a core holder (13) with one-way valve 7 (2); HBD-2 A single pipeline with a one-way valve 8 (2) is led out from a high-pressure annular pressure pump (6) and connected to a core displacement experimental device (10); a single pipeline with a one-way valve 9 (2) is led out from a KDHB-70 back pressure tracking pump (9) and connected to the right side of a core holder (13), and then the pipeline led out from the right side is connected to a 10 ml test tube (11) with a scale, and a single pipeline is led out from it and connected to a gas flow meter (12), and then connected to a computer.
2. An online nuclear magnetic carbon dioxide displacement long core device according to claim 1, characterized in that: The nuclear magnetic resonance instrument (8) is located on the periphery of the middle part of the core displacement experimental device (10) and is connected to the computer. The core holder (13) is installed in the middle part.
3. The online nuclear magnetic carbon dioxide displacement long core device according to claim 1, characterized in that: The core holder (13) contains two fake core steel blocks (7) located on both sides.
4. The on-line nuclear magnetic carbon dioxide displacement long core device according to claim 1, characterized in that: A wooden stopper with two small holes is provided on a 10 ml test tube (11) with a scale, and the left and right pipelines are connected through the small holes, and the length of the left pipeline in the test tube is greater than the length of the right pipeline.
5. The on-line nuclear magnetic carbon dioxide displacement long core device according to claim 1, characterized in that: A data collection device for an online nuclear magnetic carbon dioxide displacement long core device comprises an HBD-2 type high pressure annular pressure pump (6), a nuclear magnetic instrument (8) and a gas flow meter (12), and is used for collecting the flow rate of carbon dioxide displacement in real time.